GO掺杂对TA1钛合金等离子体电解氧化涂层硬度和耐磨性能的影响

Effects of GO doping on the properties of PEO coatings on TA1 titanium alloy

本研究在掺杂氧化石墨烯(简称“CO”)的硅酸盐电解液中对TA1钛合金进行等离子体电解氧化处理,旨在获得较高硬度的等离子体电解氧化陶瓷涂层(PEO)。通过表征涂层的物相组成、表面与截面形貌、粗糙度、显微硬度、摩擦因数以及结合力等参数,分析了CO浓度对涂层性能的影响。研究结果表明,CO参与涂层的形成过程,能够有效地减小微孔和裂纹尺寸,表面粗糙度降低。涂层厚度虽然略有降低,但致密性显著增加。与未掺杂GO的PEO涂层相比,当GO掺杂量为0.6g·L^(-1)时掺杂GO的PEO涂层显微硬度提升18.54%,摩擦系数降低84%,临界载荷强度提高32.59%。

In this study,plasma electrolytic oxidation treatment was performed on TA1 titanium alloy in silicate electrolyte doped with graphene oxide(GO)to obtain high hardness plasma electrolytic oxidation coating(PEO).The effect of GO concentration on coating properties was analyzed by characterizing the phase composition,surface and cross section morphology,roughness,microhardness,friction coefficient,and binding force of the coating.The results showed that GO participates in the coating formation process,which can effectively reduce the size of micropores and cracks,and reduce the surface roughness.Although the coating thickness decreased slightly,the density increased significantly.Compared with the non-doped GO PEO coating,the PEO coating with GO doping at a concentration of O.6 g·L^(-1) had an increase of 18.54% in the microhardness,a decrease of 84% in the friction coefficient,and an increase of 32.59% in the critical load strength.